Missing Bill and Income Reminders from account registers

I'm currently using version R27.28 of Quicken H&B, and upon opening Quicken today I noticed that the account registers are missing the usual Bill and Income Reminders that I have set up. The Bill and Income Reminders tab at the bottom of the register views are displaying the number of reminders due, but the display window for the reminders is blank with a message: "You don't have any bills or deposits due for this account" - which is not correct. I KNOW there are reminders that should be showing, so what went wrong?
Quicken user since ~1990 (DOS).
Quicken for Windows Home, Business, and Rental Properties subscriber (I don't own rentals)
Windows 7 Professional x64 on a desktop PC with 24-in wide-screen monitor.